linux.git/drivers/clk/pxa, branch v3.19

Merge branch 'clk-fixes' into clk-next

2014-11-25T01:45:33+00:00

clk: pxa: keep clocks initialization separated per variant

2014-11-17T19:27:45+00:00

Have each pxa variant (pxa25x, pxa27x, pxa3xx) have its own device-tree
clock initializing function, to be able to register its own specific
core clocks.

Apply that change specifically to pxa27x.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Michael Turquette

clk: pxa: declare init function and data __init

2014-11-17T19:27:44+00:00

As the clock descriptions are constant and only usefull at init time,
mark them as such by :
 - spliting clock description (desc) and clock private data (dynamic)
 - mark __initdata clock descriptions

This makes all the register and descriptions of the clocks to go after
kernel init phase.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Michael Turquette

clk: pxa: fix pxa27x CCCR bit usage

2014-11-17T19:25:29+00:00

Trivial fix to check the A bit of CCCR for memory frequency
calculations, where the shift of the bit index was missing, triggering a
wrong calculation of memory frequency.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Michael Turquette

clk: add pxa25x clock drivers

2014-11-17T19:20:55+00:00

Move pxa25x clock drivers from arch/arm/mach-pxa to driver/clk.
In the move :
 - convert to new clock framework legacy clocks
 - provide clocks as before for platform data based boards
 - provide clocks through devicetree with clk-pxa-dt

This is the preliminary step in the conversion. The remaining steps are
:
 - pxa3xx
 - once PXA is fully converted to device tree, if that happens,
   clk-pxa2* and clk-pxa3* should only hold the core clocks which cannot
   be described in devicetree.

Signed-off-by: Robert Jarzmik 
Tested-by: Dmitry Eremin-Solenikov 
Signed-off-by: Michael Turquette

clk: add pxa27x clock drivers

2014-09-30T19:31:31+00:00

Move pxa27x clock drivers from arch/arm/mach-pxa to driver/clk.
In the move :
 - convert to new clock framework legacy clocks
 - provide clocks as before for platform data based boards
 - provide clocks through devicetree

Signed-off-by: Robert Jarzmik 
Signed-off-by: Mike Turquette

clk: add pxa clocks infrastructure

2014-09-30T19:31:30+00:00

Add a the common code used by all PXA variants.

This is the first step in the transition from architecture defined
clocks (in arch/arm/mach-pxa) towards clock framework. The goal is to
have the same features (and not all the features) of the existing
clocks, and enable the transition of PXA to device-tree.

All PXA rely on a "CKEN" type clock, which :
 - has a gate (bit in CKEN register)
 - is generated from a PLL, generally divided
 - has an alternate low power clock

Each variant will specialize the CKEN clock :
 - pxa25x have no low power clock
 - pxa27x in low power use always the 13 MHz ring oscillator
 - pxa3xx in low power have specific dividers for each clock

The device-tree provides a list of CLK_* (ex: CLK_USB or CLK_I2C) to get
a handle on the clock. While pxa-clock.h will describe all the clocks of
all the variants, each variant will only use a subset of it.

Signed-off-by: Robert Jarzmik 
Signed-off-by: Mike Turquette